Physicochemical aspects of the development of new functional materials based on heterosubstituted titanates of rare-earth elements with the Perovskite structure

1998 ◽  
Vol 34 (6) ◽  
pp. 301-318 ◽  
Author(s):  
A. G. Belous
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Perovskite Structure ◽  
Functional Materials

scholarly journals Rare Earth Elements in Kuznetsk Coals: Ability to Excavate and New Functional Materials

2014 ◽  
Author(s):  
Tatyana G Cherkasova ◽  
Elizaveta V Cherkasova ◽  
Elza S Tatarinova ◽  
Alena A Bobrovnikova ◽  
Irina P. Goryunova ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Functional Materials

scholarly journals Перетворення у системах нітратних прекурсорів на підготовчих стадіях формування РЗЕ-вмісних оксидних функціональних матеріалів

2015 ◽  
pp. 132-143
Author(s):  
О. Г. Дрючко ◽  
Д. О. Стороженко ◽  
Н. В. Бунякіна ◽  
І. О. Іваницька ◽  
Д. В. Голубятніков ◽  
...  
Keyword(s):  
Physical Chemistry ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Periodic System ◽  
Chemical Interaction ◽  
Thermal Transformation ◽  
Functional Materials ◽  
Structural Components ◽  
Sensitive Characteristics ◽  
Joint Behavior

Із застосуванням комплексу фізико-хімічних мето-дів авторами вивчено природу й особливості хімічноївзаємодії, теплових перетворень (25–1000 оС) струк-турних компонентів у системі нітратів неодиму ікалію, як модельних систем нітратів рідкісноземель-них елементів і елементів ІА групи періодичної сис-теми, амонію, що нині широко використовуються усинтезах, технологічних регламентах створення наїх основі функціональних матеріалів різного призна-чення із заданим комплексом структурно-чутливиххарактеристик. Виявлена низка особливостей і зако-номірностей у їх сукупній поведінці. Using the complex of physical chemistry methods the authors studied nature and special features of chemical interaction, thermal transformation (25–1000 oC) of structural components in the system of nitrates of neodymium and potassium as model of the systems of nitrates of rare-earth elements and elements IA of the group of periodic system, ammonium, which are now widely used in the syntheses, the technological regulations of the creation of the functional materials of different designation with the assigned complex of structurally sensitive characteristics. A number of special features and regularities in their joint behavior was discovered.

PROSPECTS FOR THE DEVELOPMENT OF METHODS FOR SYNTHESIZING PEROVSKITE STRUCTURE TITANATES AND DOPING THEM WITH RARE-EARTH ELEMENTS

2018 ◽  
pp. 31-41
Author(s):  
V. V. Cherepov ◽  
A. N. Kropachev ◽  
O. N. Budin
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Microwave Radiation ◽  
Perovskite Structure ◽  
Size Structure ◽  
Solid Phase ◽  
Radiation Power ◽  
Ferroelectric Properties ◽  
Morphological Properties ◽  
Electromagnetic Properties

The paper presents an overview of methods for obtaining perovskite structure titanates and doping them with rare-earth elements. The results of scientific research conducted by authors from different countries related to the study of the effect of doping perovskite structure titanates with rare-earth elements on their electromagnetic properties are discussed. The paper also comprises information on the use of perovskite structure titanates in various industries. As exemplified by barium titanate (BaTiO3), a comparative analysis of some morphological properties (particle size, structure) and electromagnetic characteristics (dielectric constant, Curie temperature, modulus of longitudinal oscillations (d33)) of powders obtained (and doped) by different methods is carried out. Techniques for various BaTiO3 preparation methods such as solvothermic, hydrothermal, sol-gel, chemical deposition, and solid-phase sintering are described. The paper provides the results of studies on the effect of changes in process parameters (temperature, pH, composition of the initial mixture of materials and concentration of reagents) on the phase, morphology and BaTiO3particle formation rate in hydrothermal synthesis (using BaCl2, TiCl4and NaOH as initial materials). In addition, experiments were conducted to study the effect of microwave radiation power in ВаСОз and ТЮ2 solid-phase sintering on the dielectric and ferroelectric properties of ВаТЮз ceramics. The analysis of methods for obtaining BaTiO3 and doping it with rare-earth elements found that at present the hydrothermal method and the method of solid-phase sintering (including with microwave radiation) can be regarded as advanced technologies for obtaining perovskite structure materials with predetermined properties.

PHYSICO-CHEMICAL ASPECTS OF USING REE-CONTAINING NÌTRATE SYSTEMS IN FORMING MULTICOMPONENT OXIDE FUNCTIONAL MATERIALS

2020 ◽  
Vol 7 (4) ◽  
pp. 40-62
Author(s):  
O.G. Dryuchko ◽  
◽  
D.O. Storozhenko ◽  
N.V. Bunyakina ◽  
I.O. Ivanytska ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Aqueous Solutions ◽  
Low Temperatures ◽  
Functional Materials ◽  
Inorganic Materials ◽  
Soft Chemistry ◽  
Multicomponent Oxide ◽  
Physico Chemical ◽  
Oxide Functional Materials

For obtaining the nanosized inorganic materials on oxides of transition and rare earth elements, the most promising is the use of methods of "soft chemistry" based on synthesis from aqueous or non-aqueous solutions at relatively low temperatures. Their key advantages are: the possibility of obtaining products with controlled composition and micromorphology, efficiency, environmental acceptance and so on.

Flame spectra of the rare-earth elements*

1962 ◽  
Vol 18 (4) ◽  
pp. 1127-1153
Author(s):  
V FASSEL ◽  
R CURRY ◽  
R KNISELEY
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
The Rare Earth
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